// ===================================================================
// Author: Matt Kruse <matt@mattkruse.com>
// WWW: http://www.mattkruse.com/
//
// NOTICE: You may use this code for any purpose, commercial or
// private, without any further permission from the author. You may
// remove this notice from your final code if you wish, however it is
// appreciated by the author if at least my web site address is kept.
//
// You may *NOT* re-distribute this code in any way except through its
// use. That means, you can include it in your product, or your web
// site, or any other form where the code is actually being used. You
// may not put the plain javascript up on your site for download or
// include it in your javascript libraries for download. 
// If you wish to share this code with others, please just point them
// to the URL instead.
// Please DO NOT link directly to my .js files from your site. Copy
// the files to your server and use them there. Thank you.
// ===================================================================

// HISTORY
// ------------------------------------------------------------------
// May 17, 2003: Fixed bug in parseDate() for dates <1970
// March 11, 2003: Added parseDate() function
// March 11, 2003: Added "NNN" formatting option. Doesn't match up
//                 perfectly with SimpleDateFormat formats, but
//                 backwards-compatability was required.

// ------------------------------------------------------------------
// These functions use the same 'format' strings as the
// java.text.SimpleDateFormat class, with minor exceptions.
// The format string consists of the following abbreviations:
//
// Field        | Full Form          | Short Form
// -------------+--------------------+-----------------------
// Year         | yyyy (4 digits)    | yy (2 digits), y (2 or 4 digits)
// Month        | MMM (name or abbr.)| MM (2 digits), M (1 or 2 digits)
//              | NNN (abbr.)        |
// Day of Month | dd (2 digits)      | d (1 or 2 digits)
// Day of Week  | EE (name)          | E (abbr)
// Hour (1-12)  | hh (2 digits)      | h (1 or 2 digits)
// Hour (0-23)  | HH (2 digits)      | H (1 or 2 digits)
// Hour (0-11)  | KK (2 digits)      | K (1 or 2 digits)
// Hour (1-24)  | kk (2 digits)      | k (1 or 2 digits)
// Minute       | mm (2 digits)      | m (1 or 2 digits)
// Second       | ss (2 digits)      | s (1 or 2 digits)
// AM/PM        | a                  |
//
// NOTE THE DIFFERENCE BETWEEN MM and mm! Month=MM, not mm!
// Examples:
//  "MMM d, y" matches: January 01, 2000
//                      Dec 1, 1900
//                      Nov 20, 00
//  "M/d/yy"   matches: 01/20/00
//                      9/2/00
//  "MMM dd, yyyy hh:mm:ssa" matches: "January 01, 2000 12:30:45AM"
// ------------------------------------------------------------------

var MONTH_NAMES=new Array('January','February','March','April','May','June','July','August','September','October','November','December','Jan','Feb','Mar','Apr','May','Jun','Jul','Aug','Sep','Oct','Nov','Dec');
var DAY_NAMES=new Array('Sunday','Monday','Tuesday','Wednesday','Thursday','Friday','Saturday','Sun','Mon','Tue','Wed','Thu','Fri','Sat');
function LZ(x) {return(x<0||x>9?"":"0")+x}

// ------------------------------------------------------------------
// isDate ( date_string, format_string )
// Returns true if date string matches format of format string and
// is a valid date. Else returns false.
// It is recommended that you trim whitespace around the value before
// passing it to this function, as whitespace is NOT ignored!
// ------------------------------------------------------------------
function isDate(val,format) {
	var date=getDateFromFormat(val,format);
	if (date==0) { return false; }
	return true;
	}

// -------------------------------------------------------------------
// compareDates(date1,date1format,date2,date2format)
//   Compare two date strings to see which is greater.
//   Returns:
//   1 if date1 is greater than date2
//   0 if date2 is greater than date1 of if they are the same
//  -1 if either of the dates is in an invalid format
// -------------------------------------------------------------------
function compareDates(date1,dateformat1,date2,dateformat2) {
	var d1=getDateFromFormat(date1,dateformat1);
	var d2=getDateFromFormat(date2,dateformat2);
	if (d1==0 || d2==0) {
		return -1;
		}
	else if (d1 > d2) {
		return 1;
		}
	return 0;
	}

// ------------------------------------------------------------------
// formatDate (date_object, format)
// Returns a date in the output format specified.
// The format string uses the same abbreviations as in getDateFromFormat()
// ------------------------------------------------------------------
function formatDate(date,format) {
	format=format+"";
	var result="";
	var i_format=0;
	var c="";
	var token="";
	var y=date.getYear()+"";
	var M=date.getMonth()+1;
	var d=date.getDate();
	var E=date.getDay();
	var H=date.getHours();
	var m=date.getMinutes();
	var s=date.getSeconds();
	var yyyy,yy,MMM,MM,dd,hh,h,mm,ss,ampm,HH,/*H,*/KK,K,kk,k;
	// Convert real date parts into formatted versions
	var value=new Object();
	if (y.length < 4) {y=""+(y-0+1900);}
	value["y"]=""+y;
	value["yyyy"]=y;
	value["yy"]=y.substring(2,4);
	value["M"]=M;
	value["MM"]=LZ(M);
	value["MMM"]=MONTH_NAMES[M-1];
	value["NNN"]=MONTH_NAMES[M+11];
	value["d"]=d;
	value["dd"]=LZ(d);
	value["E"]=DAY_NAMES[E+7];
	value["EE"]=DAY_NAMES[E];
	value["H"]=H;
	value["HH"]=LZ(H);
	if (H==0){value["h"]=12;}
	else if (H>12){value["h"]=H-12;}
	else {value["h"]=H;}
	value["hh"]=LZ(value["h"]);
	if (H>11){value["K"]=H-12;} else {value["K"]=H;}
	value["k"]=H+1;
	value["KK"]=LZ(value["K"]);
	value["kk"]=LZ(value["k"]);
	if (H > 11) { value["a"]="PM"; }
	else { value["a"]="AM"; }
	value["m"]=m;
	value["mm"]=LZ(m);
	value["s"]=s;
	value["ss"]=LZ(s);
	while (i_format < format.length) {
		c=format.charAt(i_format);
		token="";
		while ((format.charAt(i_format)==c) && (i_format < format.length)) {
			token += format.charAt(i_format++);
			}
		if (value[token] != null) { result=result + value[token]; }
		else { result=result + token; }
                alert(result);
		}
	return result;
	}

// ------------------------------------------------------------------
// Utility functions for parsing in getDateFromFormat()
// ------------------------------------------------------------------
function _isInteger(val) {
	var digits="1234567890";
	for (var i=0; i < val.length; i++) {
		if (digits.indexOf(val.charAt(i))==-1) { return false; }
		}
	return true;
	}
function _getInt(str,i,minlength,maxlength) {
	for (var x=maxlength; x>=minlength; x--) {
		var token=str.substring(i,i+x);
		if (token.length < minlength) { return null; }
		if (_isInteger(token)) { return token; }
		}
	return null;
	}

// ------------------------------------------------------------------
// getDateFromFormat( date_string , format_string )
//
// This function takes a date string and a format string. It matches
// If the date string matches the format string, it returns the
// getTime() of the date. If it does not match, it returns 0.
// ------------------------------------------------------------------
function getDateFromFormat(val,format) {
	val=val+"";
	format=format+"";
	var i_val=0;
	var i_format=0;
	var c="";
	var token="";
	var token2="";
	var x,y;
	var now=new Date();
	var year=now.getYear();
	var month=now.getMonth()+1;
	var date=1;
	var hh=now.getHours();
	var mm=now.getMinutes();
	var ss=now.getSeconds();
	var ampm="";

	while (i_format < format.length) {
		// Get next token from format string
		c=format.charAt(i_format);
		token="";
		while ((format.charAt(i_format)==c) && (i_format < format.length)) {
			token += format.charAt(i_format++);
			}
		// Extract contents of value based on format token
		if (token=="yyyy" || token=="yy" || token=="y") {
			if (token=="yyyy") { x=4;y=4; }
			if (token=="yy")   { x=2;y=2; }
			if (token=="y")    { x=2;y=4; }
			year=_getInt(val,i_val,x,y);
			if (year==null) { return 0; }
			i_val += year.length;
			if (year.length==2) {
				if (year > 70) { year=1900+(year-0); }
				else { year=2000+(year-0); }
				}
			}
		else if (token=="MMM"||token=="NNN"){
			month=0;
			for (var i=0; i<MONTH_NAMES.length; i++) {
				var month_name=MONTH_NAMES[i];
				if (val.substring(i_val,i_val+month_name.length).toLowerCase()==month_name.toLowerCase()) {
					if (token=="MMM"||(token=="NNN"&&i>11)) {
						month=i+1;
						if (month>12) { month -= 12; }
						i_val += month_name.length;
						break;
						}
					}
				}
			if ((month < 1)||(month>12)){return 0;}
			}
		else if (token=="EE"||token=="E"){
			for (var i=0; i<DAY_NAMES.length; i++) {
				var day_name=DAY_NAMES[i];
				if (val.substring(i_val,i_val+day_name.length).toLowerCase()==day_name.toLowerCase()) {
					i_val += day_name.length;
					break;
					}
				}
			}
		else if (token=="MM"||token=="M") {
			month=_getInt(val,i_val,token.length,2);
			if(month==null||(month<1)||(month>12)){return 0;}
			i_val+=month.length;}
		else if (token=="dd"||token=="d") {
			date=_getInt(val,i_val,token.length,2);
			if(date==null||(date<1)||(date>31)){return 0;}
			i_val+=date.length;}
		else if (token=="hh"||token=="h") {
			hh=_getInt(val,i_val,token.length,2);
			if(hh==null||(hh<1)||(hh>12)){return 0;}
			i_val+=hh.length;}
		else if (token=="HH"||token=="H") {
			hh=_getInt(val,i_val,token.length,2);
			if(hh==null||(hh<0)||(hh>23)){return 0;}
			i_val+=hh.length;}
		else if (token=="KK"||token=="K") {
			hh=_getInt(val,i_val,token.length,2);
			if(hh==null||(hh<0)||(hh>11)){return 0;}
			i_val+=hh.length;}
		else if (token=="kk"||token=="k") {
			hh=_getInt(val,i_val,token.length,2);
			if(hh==null||(hh<1)||(hh>24)){return 0;}
			i_val+=hh.length;hh--;}
		else if (token=="mm"||token=="m") {
			mm=_getInt(val,i_val,token.length,2);
			if(mm==null||(mm<0)||(mm>59)){return 0;}
			i_val+=mm.length;}
		else if (token=="ss"||token=="s") {
			ss=_getInt(val,i_val,token.length,2);
			if(ss==null||(ss<0)||(ss>59)){return 0;}
			i_val+=ss.length;}
		else if (token=="a") {
			if (val.substring(i_val,i_val+2).toLowerCase()=="am") {ampm="AM";}
			else if (val.substring(i_val,i_val+2).toLowerCase()=="pm") {ampm="PM";}
			else {return 0;}
			i_val+=2;}
		else {
			if (val.substring(i_val,i_val+token.length)!=token) {return 0;}
			else {i_val+=token.length;}
			}
		}
	// If there are any trailing characters left in the value, it doesn't match
	if (i_val != val.length) { return 0; }
	// Is date valid for month?
	if (month==2) {
		// Check for leap year
		if ( ( (year%4==0)&&(year%100 != 0) ) || (year%400==0) ) { // leap year
			if (date > 29){ return 0; }
			}
		else { if (date > 28) { return 0; } }
		}
	if ((month==4)||(month==6)||(month==9)||(month==11)) {
		if (date > 30) { return 0; }
		}
	// Correct hours value
	if (hh<12 && ampm=="PM") { hh=hh-0+12; }
	else if (hh>11 && ampm=="AM") { hh-=12; }
	var newdate=new Date(year,month-1,date,hh,mm,ss);
	return newdate.getTime();
	}

// ------------------------------------------------------------------
// parseDate( date_string [, prefer_euro_format] )
//
// This function takes a date string and tries to match it to a
// number of possible date formats to get the value. It will try to
// match against the following international formats, in this order:
// y-M-d   MMM d, y   MMM d,y   y-MMM-d   d-MMM-y  MMM d
// M/d/y   M-d-y      M.d.y     MMM-d     M/d      M-d
// d/M/y   d-M-y      d.M.y     d-MMM     d/M      d-M
// A second argument may be passed to instruct the method to search
// for formats like d/M/y (european format) before M/d/y (American).
// Returns a Date object or null if no patterns match.
// ------------------------------------------------------------------
function parseDate(val) {
	var preferEuro=(arguments.length==2)?arguments[1]:false;
	generalFormats=new Array('y-M-d','MMM d, y','MMM d,y','y-MMM-d','d-MMM-y','MMM d');
	monthFirst=new Array('M/d/y','M-d-y','M.d.y','MMM-d','M/d','M-d');
	dateFirst =new Array('d/M/y','d-M-y','d.M.y','d-MMM','d/M','d-M');
	var checkList=new Array('dateFirst');
	var d=null;
	for (var i=0; i<checkList.length; i++) {
		var l=window[checkList[i]];
		for (var j=0; j<l.length; j++) {
			d=getDateFromFormat(val,l[j]);
			if (d!=0) { return new Date(d); }
			}
		}
	return null;
	}
        
function getLocaleShortDateString(/*d*/){
    var f={"ar-SA":"dd/MM/yy","bg-BG":"dd.M.yyyy","ca-ES":"dd/MM/yyyy","zh-TW":"yyyy/M/d","cs-CZ":"d.M.yyyy","da-DK":"dd-MM-yyyy","de-DE":"dd.MM.yyyy","el-GR":"d/M/yyyy","en-US":"M/d/yyyy","fi-FI":"d.M.yyyy","fr-FR":"dd/MM/yyyy","he-IL":"dd/MM/yyyy","hu-HU":"yyyy. MM. dd.","is-IS":"d.M.yyyy","it-IT":"dd/MM/yyyy","ja-JP":"yyyy/MM/dd","ko-KR":"yyyy-MM-dd","nl-NL":"d-M-yyyy","nb-NO":"dd.MM.yyyy","pl-PL":"yyyy-MM-dd","pt-BR":"d/M/yyyy","ro-RO":"dd.MM.yyyy","ru-RU":"dd.MM.yyyy","hr-HR":"d.M.yyyy","sk-SK":"d. M. yyyy","sq-AL":"yyyy-MM-dd","sv-SE":"yyyy-MM-dd","th-TH":"d/M/yyyy","tr-TR":"dd.MM.yyyy","ur-PK":"dd/MM/yyyy","id-ID":"dd/MM/yyyy","uk-UA":"dd.MM.yyyy","be-BY":"dd.MM.yyyy","sl-SI":"d.M.yyyy","et-EE":"d.MM.yyyy","lv-LV":"yyyy.MM.dd.","lt-LT":"yyyy.MM.dd","fa-IR":"MM/dd/yyyy","vi-VN":"dd/MM/yyyy","hy-AM":"dd.MM.yyyy","az-Latn-AZ":"dd.MM.yyyy","eu-ES":"yyyy/MM/dd","mk-MK":"dd.MM.yyyy","af-ZA":"yyyy/MM/dd","ka-GE":"dd.MM.yyyy","fo-FO":"dd-MM-yyyy","hi-IN":"dd-MM-yyyy","ms-MY":"dd/MM/yyyy","kk-KZ":"dd.MM.yyyy","ky-KG":"dd.MM.yy","sw-KE":"M/d/yyyy","uz-Latn-UZ":"dd/MM yyyy","tt-RU":"dd.MM.yyyy","pa-IN":"dd-MM-yy","gu-IN":"dd-MM-yy","ta-IN":"dd-MM-yyyy","te-IN":"dd-MM-yy","kn-IN":"dd-MM-yy","mr-IN":"dd-MM-yyyy","sa-IN":"dd-MM-yyyy","mn-MN":"yy.MM.dd","gl-ES":"dd/MM/yy","kok-IN":"dd-MM-yyyy","syr-SY":"dd/MM/yyyy","dv-MV":"dd/MM/yy","ar-IQ":"dd/MM/yyyy","zh-CN":"yyyy/M/d","de-CH":"dd.MM.yyyy","en-GB":"dd/MM/yyyy","es-MX":"dd/MM/yyyy","fr-BE":"d/MM/yyyy","it-CH":"dd.MM.yyyy","nl-BE":"d/MM/yyyy","nn-NO":"dd.MM.yyyy","pt-PT":"dd-MM-yyyy","sr-Latn-CS":"d.M.yyyy","sv-FI":"d.M.yyyy","az-Cyrl-AZ":"dd.MM.yyyy","ms-BN":"dd/MM/yyyy","uz-Cyrl-UZ":"dd.MM.yyyy","ar-EG":"dd/MM/yyyy","zh-HK":"d/M/yyyy","de-AT":"dd.MM.yyyy","en-AU":"d/MM/yyyy","es-ES":"dd/MM/yyyy","fr-CA":"yyyy-MM-dd","sr-Cyrl-CS":"d.M.yyyy","ar-LY":"dd/MM/yyyy","zh-SG":"d/M/yyyy","de-LU":"dd.MM.yyyy","en-CA":"dd/MM/yyyy","es-GT":"dd/MM/yyyy","fr-CH":"dd.MM.yyyy","ar-DZ":"dd-MM-yyyy","zh-MO":"d/M/yyyy","de-LI":"dd.MM.yyyy","en-NZ":"d/MM/yyyy","es-CR":"dd/MM/yyyy","fr-LU":"dd/MM/yyyy","ar-MA":"dd-MM-yyyy","en-IE":"dd/MM/yyyy","es-PA":"MM/dd/yyyy","fr-MC":"dd/MM/yyyy","ar-TN":"dd-MM-yyyy","en-ZA":"yyyy/MM/dd","es-DO":"dd/MM/yyyy","ar-OM":"dd/MM/yyyy","en-JM":"dd/MM/yyyy","es-VE":"dd/MM/yyyy","ar-YE":"dd/MM/yyyy","en-029":"MM/dd/yyyy","es-CO":"dd/MM/yyyy","ar-SY":"dd/MM/yyyy","en-BZ":"dd/MM/yyyy","es-PE":"dd/MM/yyyy","ar-JO":"dd/MM/yyyy","en-TT":"dd/MM/yyyy","es-AR":"dd/MM/yyyy","ar-LB":"dd/MM/yyyy","en-ZW":"M/d/yyyy","es-EC":"dd/MM/yyyy","ar-KW":"dd/MM/yyyy","en-PH":"M/d/yyyy","es-CL":"dd-MM-yyyy","ar-AE":"dd/MM/yyyy","es-UY":"dd/MM/yyyy","ar-BH":"dd/MM/yyyy","es-PY":"dd/MM/yyyy","ar-QA":"dd/MM/yyyy","es-BO":"dd/MM/yyyy","es-SV":"dd/MM/yyyy","es-HN":"dd/MM/yyyy","es-NI":"dd/MM/yyyy","es-PR":"dd/MM/yyyy","am-ET":"d/M/yyyy","tzm-Latn-DZ":"dd-MM-yyyy","iu-Latn-CA":"d/MM/yyyy","sma-NO":"dd.MM.yyyy","mn-Mong-CN":"yyyy/M/d","gd-GB":"dd/MM/yyyy","en-MY":"d/M/yyyy","prs-AF":"dd/MM/yy","bn-BD":"dd-MM-yy","wo-SN":"dd/MM/yyyy","rw-RW":"M/d/yyyy","qut-GT":"dd/MM/yyyy","sah-RU":"MM.dd.yyyy","gsw-FR":"dd/MM/yyyy","co-FR":"dd/MM/yyyy","oc-FR":"dd/MM/yyyy","mi-NZ":"dd/MM/yyyy","ga-IE":"dd/MM/yyyy","se-SE":"yyyy-MM-dd","br-FR":"dd/MM/yyyy","smn-FI":"d.M.yyyy","moh-CA":"M/d/yyyy","arn-CL":"dd-MM-yyyy","ii-CN":"yyyy/M/d","dsb-DE":"d. M. yyyy","ig-NG":"d/M/yyyy","kl-GL":"dd-MM-yyyy","lb-LU":"dd/MM/yyyy","ba-RU":"dd.MM.yy","nso-ZA":"yyyy/MM/dd","quz-BO":"dd/MM/yyyy","yo-NG":"d/M/yyyy","ha-Latn-NG":"d/M/yyyy","fil-PH":"M/d/yyyy","ps-AF":"dd/MM/yy","fy-NL":"d-M-yyyy","ne-NP":"M/d/yyyy","se-NO":"dd.MM.yyyy","iu-Cans-CA":"d/M/yyyy","sr-Latn-RS":"d.M.yyyy","si-LK":"yyyy-MM-dd","sr-Cyrl-RS":"d.M.yyyy","lo-LA":"dd/MM/yyyy","km-KH":"yyyy-MM-dd","cy-GB":"dd/MM/yyyy","bo-CN":"yyyy/M/d","sms-FI":"d.M.yyyy","as-IN":"dd-MM-yyyy","ml-IN":"dd-MM-yy","en-IN":"dd-MM-yyyy","or-IN":"dd-MM-yy","bn-IN":"dd-MM-yy","tk-TM":"dd.MM.yy","bs-Latn-BA":"d.M.yyyy","mt-MT":"dd/MM/yyyy","sr-Cyrl-ME":"d.M.yyyy","se-FI":"d.M.yyyy","zu-ZA":"yyyy/MM/dd","xh-ZA":"yyyy/MM/dd","tn-ZA":"yyyy/MM/dd","hsb-DE":"d. M. yyyy","bs-Cyrl-BA":"d.M.yyyy","tg-Cyrl-TJ":"dd.MM.yy","sr-Latn-BA":"d.M.yyyy","smj-NO":"dd.MM.yyyy","rm-CH":"dd/MM/yyyy","smj-SE":"yyyy-MM-dd","quz-EC":"dd/MM/yyyy","quz-PE":"dd/MM/yyyy","hr-BA":"d.M.yyyy.","sr-Latn-ME":"d.M.yyyy","sma-SE":"yyyy-MM-dd","en-SG":"d/M/yyyy","ug-CN":"yyyy-M-d","sr-Cyrl-BA":"d.M.yyyy","es-US":"M/d/yyyy"};

    var l=navigator.language;//?navigator.language:navigator['userLanguage'],y=d.getFullYear(),m=d.getMonth()+1,d=d.getDate();
    f=(l in f)?f[l]:"dd/MM/yy";
//    function z(s){s=''+s;return s.length>1?s:'0'+s;}
//    f=f.replace(/yyyy/,y);f=f.replace(/yy/,String(y).substr(2));
//    f=f.replace(/MM/,z(m));f=f.replace(/M/,m);
//    f=f.replace(/dd/,z(d));f=f.replace(/d/,d);
    return f;
}